scholarly journals Stress Resistance and Adaptation of the Aquatic Invasive Species Tubastraea Coccinea (Lesson, 1829) to Climate Change and Ocean Acidification

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3645
Author(s):  
Kevin B. Strychar ◽  
Briana Hauff-Salas ◽  
Joshua A. Haslun ◽  
Jessica DeBoer ◽  
Katherine Cryer ◽  
...  
Keyword(s):  
Climate Change ◽  
Invasive Species ◽  
Aquatic Invasive Species ◽  
Tissue Loss ◽  
Hsp70 Expression ◽  
Increased Sensitivity ◽  
Tubastraea Coccinea ◽  
Time Required ◽  
Increasing Temperature

A great number of studies published on long-term ocean warming and increased acidification have forecasted changes in regional biodiversity preempted by aquatic invasive species (AIS). The present paper is focused on invasive Tubastraea coccinea (TC), an azooxanthellate AIS coral thriving in regions of the Gulf of Mexico, which has shown an ability to invade altered habitats, including endemic Indo-Pacific T. coccinea (TCP) populations. To determine if invasive TC are more stress resistant than endemic Indo-Pacific T. coccinea (TCP), authors measured tissue loss and heat shock protein 70 (HSP70) expression, using a full factorial design, post exposure to changes in pH (7.5 and 8.1) and heat stress (31 °C and 34 °C). Overall, the mean time required for TCP to reach 50% tissue loss (LD50) was less than observed for TC by a factor of 0.45 (p < 0.0003). Increasing temperature was found to be a significant main effect (p = 0.004), decreasing the LD50 by a factor of 0.58. Increasing acidity to pH 7.5 from 8.1 did not change the sensitivity of TC to temperature; however, TCP displayed increased sensitivity at 31 °C. Increases in the relative density of HSP70 (TC) were seen at all treatment levels. Hence, TC appears more robust compared to TCP and may emerge as a new dominant coral displacing endemic populations as a consequence of climate change.

scholarly journals The widespread collapse of an invasive species: Argentine ants ( Linepithema humile ) in New Zealand

2011 ◽  
Vol 8 (3) ◽  
pp. 430-433 ◽  
Author(s):  
Meghan Cooling ◽  
Stephen Hartley ◽  
Dalice A. Sim ◽  
Philip J. Lester
Keyword(s):  
Climate Change ◽  
Invasive Species ◽  
New Zealand ◽  
Argentine Ant ◽  
Environmental Costs ◽  
Argentine Ants ◽  
Ant Communities ◽  
Mean Survival Time ◽  
Colony Collapse ◽  
Increasing Temperature

Synergies between invasive species and climate change are widely considered to be a major biodiversity threat. However, invasive species are also hypothesized to be susceptible to population collapse, as we demonstrate for a globally important invasive species in New Zealand. We observed Argentine ant populations to have collapsed in 40 per cent of surveyed sites. Populations had a mean survival time of 14.1 years (95% CI = 12.9–15.3 years). Resident ant communities had recovered or partly recovered after their collapse. Our models suggest that climate change will delay colony collapse, as increasing temperature and decreasing rainfall significantly increased their longevity, but only by a few years. Economic and environmental costs of invasive species may be small if populations collapse on their own accord.

scholarly journals Driving modes and material stability of a double membrane rheometer and density sensor

2013 ◽  
Vol 2 (1) ◽  
pp. 19-26 ◽  
Author(s):  
B. Weiss ◽  
M. Heinisch ◽  
E. K. Reichel ◽  
B. Jakoby
Keyword(s):  
Mass Density ◽  
Practical Implementation ◽  
Double Membrane ◽  
Material Stability ◽  
Second Mode ◽  
Modes Of Vibration ◽  
Increased Sensitivity ◽  
The Stability ◽  
Increasing Temperature

Abstract. This contribution presents the analysis of an earlier proposed double membrane sensor for measuring mass density and rheological properties of liquids with respect to different driving modes. Concerning practical implementation the sensor mounting and the stability of the polyethylene foil, currently used as membrane material, are investigated. The sensor is based on two opposed membranes vibrating in parallel where a sample liquid is enclosed between the membranes. The excitation and read-out mechanisms of the membrane vibration are based on Lorentz forces induced in a static magnetic field. Each membrane carries three conductive paths for excitation, which can be separately connected to the excitation currents. This allows the excitation of the first and second modes of vibration and enables prestressing the second mode of oscillation. Analyzing the material-stability of the used polyethylene foil shows a strong long-term drift of the modulus of elasticity and an increase of internal damping with increasing temperature. Comparing the resonance frequency of the fundamental mode with earlier measurements achieved with the second mode of resonance indicates an increased sensitivity to density featuring a reasonably sustained quality factor for high viscosities. Thereby, the sensitivity can be adjusted by varying the distance between the membranes.

scholarly journals Genomic analyses of Northern snakehead (Channa argus) populations in North America

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4581 ◽  
Author(s):  
Carlee A. Resh ◽  
Matthew P. Galaska ◽  
Andrew R. Mahon
Keyword(s):  
United States ◽  
Invasive Species ◽  
River Basin ◽  
Hudson River ◽  
The United States ◽  
Aquatic Invasive Species ◽  
Potomac River ◽  
Potomac River Basin ◽  
Channa Argus

Background The introduction of northern snakehead (Channa argus; Anabantiformes: Channidae) and their subsequent expansion is one of many problematic biological invasions in the United States. This harmful aquatic invasive species has become established in various parts of the eastern United States, including the Potomac River basin, and has recently become established in the Mississippi River basin in Arkansas. Effective management of C. argus and prevention of its further spread depends upon knowledge of current population structure in the United States. Methods Novel methods for invasive species using whole genomic scans provide unprecedented levels of data, which are able to investigate fine scale differences between and within populations of organisms. In this study, we utilize 2b-RAD genomic sequencing to recover 1,007 single-nucleotide polymorphism (SNP) loci from genomic DNA extracted from 165 C. argus individuals: 147 individuals sampled along the East Coast of the United States and 18 individuals sampled throughout Arkansas. Results Analysis of those SNP loci help to resolve existing population structure and recover five genetically distinct populations of C. argus in the United States. Additionally, information from the SNP loci enable us to begin to calculate the long-term effective population size ranges of this harmful aquatic invasive species. We estimate long-term Ne to be 1,840,000–18,400,000 for the Upper Hudson River basin, 4,537,500–45,375,000 for the Lower Hudson River basin, 3,422,500–34,225,000 for the Potomac River basin, 2,715,000–7,150,000 for Philadelphia, and 2,580,000–25,800,000 for Arkansas populations. Discussion and Conclusions This work provides evidence for the presence of more genetic populations than previously estimated and estimates population size, showing the invasive potential of C. argus in the United States. The valuable information gained from this study will allow effective management of the existing populations to avoid expansion and possibly enable future eradication efforts.

scholarly journals Interactive influences of fluctuations of main food resources and climate change on long-term population decline of Tengmalm’s owls in the boreal forest

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Marek Kouba ◽  
Luděk Bartoš ◽  
Jitka Bartošová ◽  
Kari Hongisto ◽  
Erkki Korpimäki
Keyword(s):  
Climate Change ◽  
Reproductive Success ◽  
Population Decline ◽  
Egg Laying ◽  
Laying Date ◽  
Late Winter ◽  
Aegolius Funereus ◽  
Increasing Temperature ◽  
Tengmalm's Owl

AbstractRecent wildlife population declines are usually attributed to multiple sources such as global climate change and habitat loss and degradation inducing decreased food supply. However, interactive effects of fluctuations in abundance of main foods and weather conditions on population densities and reproductive success have been studied rarely. We analysed long-term (1973–2018) data on Tengmalm’s owl (Aegolius funereus) and the influence of prey abundance and weather on breeding densities and reproductive success in western Finland. We found that fledgling production per breeding attempt declined and laying date of the owl population delayed during the period between 1973 and 2018. The breeding density of the owl population decreased with increasing temperature in winter (October–March), fledgling production increased with increasing temperature and precipitation in spring (April–June), whereas the initiation of egg-laying was delayed with increasing depth of snow cover in late winter (January–March). The decreasing trend of fledgling production, which was mainly due to starvation of offspring, was an important factor contributing to the long-term decline of the Tengmalm’s owl study population. Milder and more humid spring and early summer temperatures due to global warming were not able to compensate for lowered offspring production of owls. The main reason for low productivity is probably loss and degradation of mature and old-growth forests due to clear-felling which results in loss of coverage of prime habitat for main (bank voles) and alternative foods (small birds) of owls inducing lack of food, and refuges against predators of Tengmalm’s owls. This interpretation was also supported by the delayed start of egg-laying during the study period although ambient temperatures increased prior to and during the egg-laying period.

scholarly journals Comparing models using air and water temperature to forecast an aquatic invasive species response to climate change

Ecosphere ◽  
2020 ◽  
Vol 11 (7) ◽  
Author(s):  
Jake R. Walsh ◽  
Gretchen J. A. Hansen ◽  
Jordan S. Read ◽  
M. Jake Vander Zanden
Keyword(s):  
Climate Change ◽  
Invasive Species ◽  
Water Temperature ◽  
Aquatic Invasive Species ◽  
Species Response

Capacity of Management Plans for Aquatic Invasive Species to Integrate Climate Change

2008 ◽  
Vol 22 (3) ◽  
pp. 568-574 ◽  
Author(s):  
BRITTA G. BIERWAGEN ◽  
ROXANNE THOMAS ◽  
AUSTIN KANE
Keyword(s):  
Climate Change ◽  
Invasive Species ◽  
Aquatic Invasive Species ◽  
Management Plans

scholarly journals The risk of establishment of aquatic invasive species: joining invasibility and propagule pressure

2007 ◽  
Vol 274 (1625) ◽  
pp. 2603-2609 ◽  
Author(s):  
Brian Leung ◽  
Nicholas E Mandrak
Keyword(s):  
Invasive Species ◽  
Zebra Mussel ◽  
Dreissena Polymorpha ◽  
Propagule Pressure ◽  
Joint Model ◽  
Aquatic Invasive Species ◽  
Invasion Risk ◽  
Invasion Pattern ◽  
Policy Priority

Invasive species are increasingly becoming a policy priority. This has spurred researchers and managers to try to estimate the risk of invasion. Conceptually, invasions are dependent both on the receiving environment (invasibility) and on the ability to reach these new areas (propagule pressure). However, analyses of risk typically examine only one or the other. Here, we develop and apply a joint model of invasion risk that simultaneously incorporates invasibility and propagule pressure. We present arguments that the behaviour of these two elements of risk differs substantially—propagule pressure is a function of time, whereas invasibility is not—and therefore have different management implications. Further, we use the well-studied zebra mussel ( Dreissena polymorpha ) to contrast predictions made using the joint model to those made by separate invasibility and propagule pressure models. We show that predictions of invasion progress as well as of the long-term invasion pattern are strongly affected by using a joint model.

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